English

Condition metrics in the three classical spaces

Differential Geometry 2015-01-20 v1

Abstract

Let (M,g)(\mathcal{M},g) be a Riemannian manifold and N\mathcal{N} a C2\mathcal{C}^2 submanifold without boundary. If we multiply the metric gg by the inverse of the squared distance to N\mathcal{N}, we obtain a new metric structure on MN\mathcal{M}\setminus\mathcal{N} called the condition metric. A question about the behaviour of the geodesics in this new metric arises from the works of Shub and Beltr\'an: is it true that for every geodesic segment in the condition metric its closest point to N\mathcal{N} is one of its endpoints? Previous works show that the answer to this question is positive (under some smoothness hypotheses) when M\mathcal{M} is the Euclidean space Rn\mathbb{R}^n. Here we prove that the answer is also positive for M\mathcal{M} being the sphere Sn\mathbb{S}^n and we give a counterexample showing that this property does not hold when M\mathcal{M} is the hyperbolic space Hn\mathbb{H}^n.

Keywords

Cite

@article{arxiv.1501.04456,
  title  = {Condition metrics in the three classical spaces},
  author = {Juan G. Criado del Rey},
  journal= {arXiv preprint arXiv:1501.04456},
  year   = {2015}
}

Comments

15 pages, 6 figures

R2 v1 2026-06-22T08:05:33.980Z